Double-walled collapsible carton



Dec. 4, 1951 R. E. PAIGE 2,5775588 DOUBLE- WALLED COLLAPSIBLE CARTON Filed Nov. 29', 1946 s Sheets-Sheet 1 I mmlllllmmm Q BY I OR E 7 a 1951 R. E. PAIGE DOUBLE-WALLED COLLAPSIBLE CARTON 5 Sheets-Sheet 2 Filed Nov. 29, 1946 Dec. 4, 1951 R. E. PAGE 2,577,588

DOUBLE-WALLED COLLAPSIBLE CARTON Filed Nov. 29, 1946 5 Sheets-Sheet 3 BY 5 I AfiORNE? Dec. 4, 1951 I R, E, A E 12,577,588

DOUBLE-WALLED COLLAPSIBLE CARTON Filed Nov. 29, 1946 I 5 Sheets-Sheet 4 f liq dBY ,ulmd

ATTNEY Dec. 4, 1951 R. E/PAIGE 2,577,588

DOUBLE-WALLED CQLLAPSIBLE CARTON Filed Nov. 29, 1946 s Sheets-Sheet 5 J03 7 T I g v 100 1 (3 L 0 -4 2 I 22 22 i 22 I l l 106 f 1 i 1-1; 1 104 2 2 I I I I 1 I, i

' INVENTOR 105 .103 Kickamiflfiaqke Patented Dec. 4, 1951 UNITED STATES PATENT OFFICE DOUBLE-WALLED COLLAPSIBLE CARTON Richard E. Paige, New York, N. Y.

Application November 29, 1946, Serial No. 712,818

26 Claims. 1

My present invention relates generally to containers, and has particular reference to collapsible cartons composed of foldable sheet material such as cardboard, corrugated board, or the like.

It is a general object of my invention to provide a carton or basket-like receptacle of relatively staunch character, intended primarily for use in the transportation af apples, vegetables, and other produce. The invention is not restricted, however, to any particular use to which the receptacle may be put.

Where commodities are transported in cartons or baskets composed of corrugated board, it is usually required that the receptacle be of doublewalled character. To accomplish this objective, it has been customary practice to employ knock down cartons which have been specially provided with many extra flaps and panels to define the double-ply walls which are desired. However, the setting up of such a carton is a tedious and cumbersome procedure, especially where the carton is of relatively large size. It is the primary object of the present invention to accomplish an equivalent result in a much simpler way by means of a device which is composed of a single initially flat blank of foldable sheet material, and which may be readily and quickly adjusted from a flattened collapsed condition into an operative set-up condition, with a minimum of effort and without requirin relatively complicated or cumbersome manipulations.

The present'improved construction is of such character that the carton may be composed of inexpensive corrugated board, ordinary cardboard, or other foldable sheet material, the manufacturing procedure being simple and economical. In collapsed flattened condition, a number of the present devices may be conveniently stacked, shipped, or stored. Without departing from the basic principle involved in its manufacture and mode of use, the device may be caused to assume varying shapes and sizes. In each case, the adjustment, of the collapsed device into a set-up condition, ready for immediate use, is speedy and expeditious, regardless of the size or cubic capacity of the resultant receptacle. Despite its creation from a single blank of material, the set-up carton is unusually staunch and rugged, and is provided with a double-Walled floor and double-walled upstanding side walls.

These desirable results are achieved, in brief,

by forming the carton of snugly nested inner and outer tubular shells each of which comprises hingedly connected panels, the shells bein connected along one set of adjacent end edges, and

being axially adjustable into telescopically contracted. and expanded relationships. In fully contracted relationship, the nested shells define a set of double-walled carton sides, and the connecting means between the shells defines a double-walled fioor. In telescopically extended relation, the nested shells are adapted to be collapsed along the hinge lines between the panels, and the connecting means lies substantially in the plane of the collapsed assembly, on the interior of the outer shell.

11; is a characterizing feature of the invention to form the carton floor by means of a series of foldable toggle strips which automatically interlock in a unique manner to define the floor of the carton whenever the device is set up.

I achieve the foregoing general objects and advantages, and such other objects and advantages as may hereinafter appear or be pointed out, in the manner illustratively exemplified in the accompanying drawings in which:

Figure l is a perspective view of a carton device constructed in accordance with the present invention and shown in collapsed condition;

Figure 2 is a perspective view of the device in partially set-up condition;

Figure 3 is a perspective view of the carton in completely set-up condition;

Figure 4 is a plan view of Figure 3;

Figure 4a is a view similar to Figure 4 showing a slight modification in the floor structure;

Figure 5 is an enlarged cross-sectional view taken substantially along the line 5-5 of Figure 4;

Figure 6 is an enlarged cross-sectional view taken substantially along the line 6-6 of Figure Figure 7 is a cross-sectional view taken substantially in the direction 'I! of Figure 2, showing the device in an intermediate adjusted stage between the relationships shown in Figures 2 and 3;

Figure 8 is a view similar to Figure 7 taken substantially in the direction 88 of Figure 2;

Figure 9 is a plan view of the single blank of which the carton may be composed;

Figures 10-15 are views corresponding, respectively, to Figures 1-6, illustrating a modification;

Figure 16 is a cross-Lctiona. view taken substantially along the direction l6-l6 of Figure 11, showing the carton in an intermediate stage of adjustment between the relationships shown in Figures 11 and 12*;

Figure 17 is a perspective view of the interior games of the carton during the process of adjusting it into set-up condition;

Figure 18 is a plan view of the blank of which the carton of Figures -17 may be composed;

Figure 19 is a perspective view of a set-up carton of modified shape;

Figure 20 is a plan view of the carton of Figure 19, with parts of the floor broken away to reveal hidden structure; and

Figure 21 is a plan view of the blank of which the carton of Figures 19 and 20 may be composed.

Referring first to Figure 9, a substantially rectangular carton of the present improved character may be formed of a single substantially rectangular blank of foldable sheet material which is scored and cut as indicated. Parallel to the edge 30 is a score line 3|. This line, in conjunction with transverse score lines 32, defines a series of four rectangular panels 33, 34, 35 and 36 which are ultimately in hinged relationship along the lines 32 to define the four sides of a tubular shell of substantially rectangular cross section when set up. It will be observed that the panels 33 and 35 are substantially the same in size, and the panels 34 and 36 are substantially the same in size. For a purpose hereinafter to be described, the panel 34 is provided with the opening 31, and the panel 36 is provided with the similar opening 38.

The panels 33-36 are adapted ultimately to form the four sides of an inner tubular shell adapted to nest within an outer shell hereinafter to be referred to.

Parallel to the opposite edge 39 of the blank is a score line 40, which, in conjunction with transverse score lines 4|, each of which alines with one of the lines 32, defines a second series of substantially rectangular panels 42, 43, 44 and 45. The panels 42 and 44 are substantially equal in size, and the panels 43 and 45 are substantially equal in size. The panel 43 is provided with the opening 46, and the panel 45 is provided with the similar opening 41.

The panels 42-45 are adapted ultimately to form the four sides of the outer tubular shell hereinbefore mentioned.

Between the score lines 3| and 40, the blank is cut and scored to define a series of adjacent connecting strips ultimately adapted to serve as foldable sections which cooperate to form the carton floor. One connecting strip consists of the sections 49 and 50 mutually hinged along the line 5|. The sections 49 and 50 are trapezoidal in shape, the long base of the trapezoid 49 coinciding with the adjacent long edge of the panel 33, and the long base of the trapezoid 50 coinciding with the adjacent long edge of the panel 42. A similar set of sections 52 and 53 are formed between the panels 35 and 44, the sections 52 and 53 being mutually hinged along the line of fold 54.

The connecting strip between the panels 34 and 43 is substantially rectangular and consists of the sections 55 and 56 mutually hinged at 51', and a similar strip consisting of the sections 58 and 53 hinged together at 60, is interposed between the panels 36 and 45.

After the blank hasbeen scored and cut as indicated in Figure 9 and as herein described, it is folded upon itself along the line 40, and is then folded transversely along the lines 32 and 4| at each side until the attachment flap 48 (on the end of panel 45) is brought into overlapping engagement with the free edge of the panel 42. This flap is then secured to this free edge either by gluing, stapling. or otherwise, and the resultant structure assumes the flattened condition shown in Figure 1. This completes. the manufacturing procedure, which, it will be noted, is extremely simple and inexpensive. In the condition shown in Figure 1, the device may be stacked with others, packaged, readily transported, or stored.

The process of setting up the device is illustrated most clearly in Figures 2-8. The first step is to open the device into the condition shown in Figure 2, in which each shell assumes a substantially tubular configuration. The outer shell, as hereinbefore mentioned, consists of the panels 42-45, its lower edge being defined by the line 40. The inner shell consists of the panels 33-36. its lower edge being defined by the line 3|. Connecting these edges are the scored foldable strips which, in Figures 1 and 2, lie substantially parallel to the respective panels which they connect.

The next and final step in setting up the structure is illustrated most clearly in Figures 7 and 8, and consists in pressing the inner shell into the outer shell, i. e., by adjusting the shells into telescopically contracted relation. During this movement, the connecting strips angle inwardly, i. e., each strip folds upon itself. During this folding adjustment, the sections 5556 and 5859 slide into positions between the folds of the adjacent trapezoidal strips or sections. Ultimately, the four folded sections lie in the interengaged relationship shown most clearly in Figures 4, 5 and 6. In this condition, these sections conjointly define a double-walled carton floor of unusually staunch character.

When the inner and outer shells are in fully telescoped position, the folded strips making up the floor have their hinged ends, and,the edges of the shells to which they are connected, all lying in the transverse plane of the adjacent end of the carton; with portions of one of the strips, such as the strip made up of the parts 55 and 53, enveloped or covered by the folded portions of the adjacent strips or sections. Also the aggregate width of the strips is equal to the perimeter of the carton.

Upon completion of the setting-up operation there will be a registry of the openings 31 and 46 in one of the side walls of the carton, and a corresponding registry of the openings 33 and 41 in the opposite side wall. Each pair of registering openings affords a convenient hand grip by means of which the carton may be conveniently grasped for lifting it or transporting it from place to place.

In the embodiment illustrated, the set of panels 33-36 are substantially the'same size as the set 42-45. It might appear that this would preclude a nesting of one of the shells inside the other, but this is not necessarily the case in practice, where the inherent yieldability of the cardboard or equivalent foldable sheet material is sufficient to permit the inner shell to be snugly telescoped into the outer shell in the manner described. However. where the material employed is of heavier variety. such as corrugated cardboard or the like, the structure lends itself readily, without deviation from the basic principles involved, to the formation of an inner shell which is slightly smaller than the outer shell so that the nesting of one within the other may, if desired, be more readily accomplished. For example, this result may be achieved in connection with the blank of Figure 9, by shifting slightly to the right the left-hand edge of the panel 33 and the fold line 32 between panels 93 and 34, and by shifting slightly to the left the right-hand edge of panel 36 and the fold line 32 between panels 35 and 36; the line 32 between panels 34 and 35 being retained, as shown. in accurate alignment with the line H between panels 43 and 44.

It will be observed, upon inspection of Figure 4, that the upper surface of the floor is not quite even, since the edges 6| of the trapezoidal section 49, and the edges 62 of the section 52, are exposed. If this is disadvantageous (and in the accommodation of certain merchandise these irregularities may not be desired), the construction may be slightly modified as indicated in Figure 4a. This modification consists in forming triangular flaps 63 on the edges 6|, and forming similar triangular flaps 64 on the edges 62'. The edges BI and 62' correspond to the edges BI and 62 of the structure shown in Figure 4. Since the construction is in other respects the same as that which has been hereinbefore described,

other reference numerals have been omitted, for the sake of clearness, from Figure 4a. The triangular flaps 63 and 64 lie fiat in the set-up condition of the carton, and thereby produce a floor which is smooth and more in a single plane.

Where the connecting elements are shaped as shown in Figure 9, i. e., by having alternate elements composed of trapezoidal sections and the intermediate elements composed of rectangular sections, the structure must necessarily have a non-square rectangular contour as shown most clearly in Figure 4. An accurately square shape would require that the fold lines 5| and 54 be reduced in length to an extent which would cause these fold lines to disappear completely. How- 'ever, the basic principle of the construction may be retained, and this limitation as to shape may be obviated, by slightly modifying the connecting strips in the manner shown most clearly in Figure 18. Attention is drawn to the fact that the carton shown in Figures 10-18 is substantially square. In this modified construction, I have also shown another way of making a minor change in the design of the original blank, so that the telescoping of the inner and outer tubular shells may be facilitated.

Referring now to Figure 18, it will be observed that, as before, the structure is composed of an initially fiat blank of substantially rectangular contour. Parallel to the edge 55 is the fold line 66. The panels 61 and 68 are defined by this line and by the transverse fold line 69; while the panels 10 and II are defined by the line 66 and the transverse fold line I2. The panels 61, 68, I and II correspond to the panels 3346 of Figure 9, but it will be noted that the panels 68 and I0 have been separated, not by a fold line, but by a slight gap I3 formed by cutting the blank along transverse lines I4. The result is that when the structure is assembled, the inner shell is slightly smaller than the outer shell.

In similar fashion, a fold line I5 is formed parallel to the opposite edge I6. This line, in conjunction with transverse fold lines I'l defines the panels I8, I9, 80 and BI corresponding to the panel series 42-45 of Figure 9. To facilitate the nesting of the inner shell within the outer shell, when the structure is to be set up, the hinge line between the panels I9 and 80 may be formed of two closely adjacent score lines 11, as shown.

As before, the panels defining the outer shell may be held together by means of an attachment flap 82 secured to the panel BI by a hinge formed of two slightly spaced score lines 11.

Hand grip openings 83, 84, 85 and 86 may be formed in the panels 68, II, III and 8|, for the purpose hereinbefore described.

The main difference between the forming of the blank of Figure 18, as compared with the blank of Figure 9, lies in the connecting strips which are interposed between the lines 66 and.

I5. Each of these strips is composed of two trapezoidal sections, but each trapezoid pair is substantially similar in shape to the others, with one edge angled and theother edge straight. Thus, the section between the panels 61 and I8 consists of the trapezoidal sections 81 and 08, hinged to each other at 89; and similar strips are formed of the section pairs 90-9! (hinged at 92), 93--94 (hinged at 95), and 96-91 (hinged at 98) The assembly f this structure, during its manufacture, is accomplished in the same manner as has been hereinbefore described. The panel series I8-8I is first folded up along the line 15, and the attachment fiap'82 is secured to the free edge of the panel I8. This causes panels IS-8| to define the-outer shell, and establishes the panels 6'I-II in an associated relationship defining the inner shell.

In normal collapsed condition, the parts assume the relationship shown in Figure 10. In setting up the carton, the elements are first opened into the condition of Figure 11, and the inner shell is then forced into the outer shell as indicated in Figures 16 and 17. This results ultimately in producing a, carton of the character shown in Figures 12-15. It will be observed that each connecting strip, in folded condition, has a triangular portion which is interposed between the folds of the adjacent connecting strip. This is most clearly indicated in Figure 1'7. The ultimate assembly has a double-walled floor of interleaved or interlocked character, and of unusual load-supporting strength.

The design shown in Figure 18 lends itself readily to the creation of box structures having more than four sides. The number of sides is preferably an even number, e. g., six, eight, etc., in order to facilitate the collapsing of the carton when the shells are in telescopically extended relationship. However, if complete collapsing is not essential, the sides may be of an odd number, since the interengagement of the connecting strips is not dependent upon an even number thereof.

By way of illustration, I have shown an eightsided carton in Figures 19-21. The construction and design are similar to that which is shown in Figures 10-18, and a brief description will suffice to explain the nature of the idea. The inner shell is defined by panels 99, four of which are connected by hinge lines I00, and the other four of which are connected by hinge lines WI. The two groups may be separated by a cut gap I02 corresponding to the gap 13 of Figure 18. In similar fashion, the outer shell is defined by panels I03 hingedly connected by fold lines I04. An attachment flap I05 is the only means required for holding the structure in assembled condition. Between each pair of corresponding panels is a connecting strip, and each strip is similar to the others and is composed of two sections I06 and I0'I hinged together at I08.

The device is manufactured in the manner hereinbefore described, and may assume a fiat collapsed condition (not shown). When it is to be set up into the condition shown in Figures 19 and 20, the shells are first opened, and the inner shell is then pressed into the outer shell. During this process, each connecting strip angles inwardly, and its corner portion interposes itself between the folds of the adjacent connecting strip. The result is an interleaved double-walled fioor of the character shown most clearly in Figure 20. The minute opening which is inevitably produced at the center of the fioor is of no importance and does not weaken the structure, the carton being, in fact, of unusual strength and stability, fully adequate to serve as a substitute for ordinary wooden produce baskets or the like.

The blank of Figure 21 may be modified. if desired. to facilitate the .nesting of the inner and outer shells. For example, each panel 9! may be slightly reduced in width relative to the corresponding panel I03. This can be feasibly accomplished by slightly shifting toward the medial fold line IN the fold lines at each side of it as well as the end edges of the left-hand group of panels 00, and by similarly slightly shifting toward the medial fold line H the fold lines at each side of it as well as the end edges of the right-hand group of panels 99. As a result, when the device is assembled, the panels 99 define hingedly associated elements of an inner shell which is slightly smaller than the outer shell defined by the panels I".

It will be understood that those skilled in the art may readily make changes in the details herein described and illustrated without necessarily departing from the spirit and scope of the invention as expressed in the appended claims.

Having thus described my invention and illustrated its use, what I claim as new and desire to secure by Letters Patent is:

1. In a collapsible carton, snugly nested inner and outer tubular shells each of which comprises hingedly connected panels, said shells being axially adjustable into and out of a telescopically contracted set-up relationship in which the overlying panels define a set of double-walled carton sides, and foldable means for forming the bottom of the carton connecting said shells along one set of adjacent end edges, said foldable means being hinged at the ends to adjacent edge portions of said inner and outer shells; said ends and said edge portions of the shells lying substantiallykin the same plane when the shells are in fully telescoped relation.

2. In a collapsible carton, snugly nested inner and outer tubular shells each of which comprises hingedly connected panels, said shells being axially adjustable into and out of a telescopically contracted set-up relationship in which the overlying panels define a set of double-walled carton sides, and means connecting said shells along one set of adjacent end edges, said means comprising a series of foldable toggle strips adapted to define a double-walled carton floor.

3. In a collapsible carton, snugly nested inner and outer tubular shells each of which comprises hingedly connected panels, said shells being axially adjustable into and out of a telescopically contracted set-up relationship in which the overlying panels define a set of double-walled carton sides, and means connecting said shells along one set of adjacent end edges, said means comprising a series of foldable strips adapted to define a double-walled carton floor, each strip comprising mutually hinged sections hingedly connected, respectively, to coincident edges of said shells.

4. In a collapsible carton, snugly nested inner and outer tubular shells each of which comprises hingedly connected panels, said shells being axially adjustable into and out of a telescopically contracted set-up relationship in which the overlying panels define a set of double-walled carton sides, and means connecting said shells along one set of adjacent end edges, said means comprising a series of foldable strips adapted to define a douhie-walled carton floor, said strips being so shaped that when folded upon themselves certain of said strips have portions interposed between the folds of at least one adjacent strip.

5. In a collapsible carton, snugly nested inner and outer tubular shells each of which comprises hingedly connected panels, said shells being axially adjustable into and out of a telescopically contracted set-up relationship in which the overlying panels define a set of double-walled carton sides, and means connecting said shells along one set of adjacent end edges, said means comprising a series of foldable strips adapted to define a double-walled carton floor, said strips being so shaped that when folded upon themselves alternate strips have portions interposed between the folds of the intermediate strips.

6. In a collapsible carton, snugly nested inner and outer tubular shells each of which comprises hingedly connected panels, said shells being axially adjustable into and out of a telescopically contracted set-up relationship in which the overlying panels define a set of double-walled carton sides, and means connecting said shells along one set of adjacent end edges, said means comprising a series of foldable strips adapted to define a double-walled carton floor, said strips being so shaped that when folded upon themselves each strip has a portion interposed between the folds of an adjacent strip.

7. In a collapsible carton, snugly nested inner and outer tubular shells each of which comprises four hingedly connected panels, said shells being axially adjustable into and out of a telescopically contracted set-up relationship in which the overlying panels define a set of four double-walled carton sides, and a series of four foldable strips connecting said shells along one set of adjacent end edges and adapted to define a double-walled carton floor, said strips being so shaped that when folded upon themselves the strips of one opposite pair have portions interposed between the folds of the other two strips.

8. In a collapsible carton, snugly nested inner and outer tubular shells each of which comprises an even number of at least four hingedly connected panels, said shells being axially adjustable into and out of a telescopically contracted setup relationship in which the overlying panels define a set of double-walled carton sides, and a series of foldable strips connecting said shells along one set of adjacent end edges and adapted to define a double-walled carton floor, there being one strip for each pair of overlying panels, said strips being so shaped that when folded upon themselves each strip has a portion interposed between the folds of an adjacent strip.

9. In a collapsible carton, snugly nested inner and outer tubular shells each of which comprises hingedly connected panels, said shells being axially adjustable into and out of a telescopically contracted set-up relationship in which the overlying panels define a set of double-walled carton sides, and means connecting said shells along one set of adjacent end edges, said means comprising a series of foldable strips adapted to define a 9 l double-walled carton floor, said shells and strips prises hingedly associated panels, the inner shell being integral Darts a S ngle initially fiat blank being htly smaller than the outer one, said of foldable sheet material. shells being axially adjustable between telescop- 10. In a collapsible carton, snugly nested inically contracted and extended relationships, and ner and outer tubular shells each of which coma. series of folding strips integral with and hingedprises hingedly connected panels, said shells bely interposed between an end edge of one shell ing axially adjustable into and out of a telescopand the adjacent end edge of the other, said ically contracted set-up rel i hip in which the strips being adapted to interlock in a common overlying panels define a set of double-walled transverse plane to define the carton floor when carton sides, said shells being collapsible alon said shells are-adjusted into telescopically consaid hinges when they are adjusted into telescoptracted relationship, said shells and strips being ically extended relationship, and foldable means integral parts of a single blank of foldable sheet for forming the bottom of the carton connected material. to both said shells along hinged lines at adjacent 18. In a collapsible carton, snugly nested inedge portions of said inner and outer shells, said ner and outer tubular shells conjointly defining hinged lines and said edge portions lying in the a set of double-walled carton sides, and a colsame plane when the shells are in fully telescoped lapsible double-walled carton fioor secured to position adapted to prevent said collapse when said shells, said fioor comprising sections hinged the shells are in set-up relationship. each at its ends to both of said shells, the secll. In a collapsible carton, snugly nested intions being foldable with a part of one section enner and outer tubular shells each of which comveloped by the folds of another section when the prises panels with hinged connections, said shells shells are in fully telescoped position. being axially adjustable into and out of a tele- 19. In a collapsible carton, snugly nested inscopically contracted set-up relationship in which ner and outer tubular shells conjointly defining the overlying panels define a set of double-walled a set of double-walled carton sides, and connectcarton sides, said shells being collapsible along ing panels between said shells adapted to define said hinged connections when they are adjusted a collapsible double-walled carton floor, said out of telescopically extended relationship, and panels being hinged at their ends to adjacent means connecting said shells to prevent said coledge portions of both shells, the ends of said lapse when the shells are in set-up relationship, panels and said edge portions, when the shells said means comprising strips substantially paralare in fully nested position, being in the same lel to said panels on the interior of the outer shell plane. when the carton is collapsed, and foldable to lie 20. In a collapsible carton, a tubular strucin a transverse plane when the carton is set up, ture adapted to be adjusted between a flattened said strips being united at their ends to adjacent condition and a set-up condition, said structure edge portions of said shells, said ends and said comprising snugly nested and axially shiftable edge portions lying in the same plane when the inner and outer tubular shells, and folding strips shells are in fully telescoped position. having hinged connection at their 'ends with ad- 12. In a collapsible carton, the structure set jacent edge portions of both Said shells to form forth in claim 11, each of said strips being hinged- 40 the bottom of the carton, said ends and said edge 1y connected t d extending between th d portions, when said shells are in fully nested posiedge of one of the inner panels and the adjacent tion. lying in the same plane.

end edge of the overlying outer panel. 2 A carton comprising an outer shell and a 13. I collapsible t t structure t shell telescoped within the outer shell, and transforth in claim 11, each of said strips being hingedversely b e s p each having in ed eon- 1y connected t and extending between th end nection at their ends to an edge portion of one edge of one of the inner panels and the adjacent S l andfl adjacent edge portion the Other.

end edge of the overlying outer panel and each said ends and said edge portions, when the shells strip comprising superposable sections. e n fully ped po i i n/ yi in the plane 14. In a collapsible carton, the structure set 60 of one end of the carton. forth in claim 11, each of said strips being hinged- 22. A carton comprising an outer shell and a ly connected to and extending between the end shell telescoped within the outer shell, and transedge of one of the inner panels and the adjacent versely foldable strips each having hinged conend edge of the overlying outer panel, the panels nection at one end with an edge portion of one and strips being integral parts of a single blank shell and an adjacent edge portion of the other of initially fiat foldable sheet material. shell, said strips having an aggregate width equal 15. In a double-walled collapsible carton, side to the perimeter of the carton and movable to walls defined by a pair of snugly nested tubular form the bottom thereof when the shells are shells each of which comprises hingedly conin fully telescoped position. nected panels, said shells being adjustable be- 23. A carton comprising an outer shell and a tween telescopically contracted and extended reshell telescoped within said outer shell, and translationships, and a series of folding strips integral versely foldable strips each having hinged conwith and hingedly interposed between an end nection at its ends with an edge portion of one edge of one shell and the adjacent end edge of the of the shells and an adjacent edge portion of the other, said strips being adapted to interlock in a other shell, said strips, when the shells are in common transverse plane to define the carton fully telescoped posit on, forming the bottom of floor when said shells are adjusted into telescopithe carton with the folded portions of one strip cally contracted relationship. partly enveloped between the folded portions of 16. In a double-walled collapsible carton, the an adjacent strip. structureset forth in claim 15, the inner and 24. A carton comprising an outer shell and a outer shells having hand-grip openings adapted shell telescoped within said outer shell, and transto register with each other when the shells are in versely foldable strips each having hinged coniu'll telescopically contracted relationship nection at its ends with an edge portion of one 17. In a collapsible carton, snugly nested inof the shells and an adjacent edge portion oi! the ner and outer tubular shells each of which comother shell, said strips, when the shells are in 11 fully teleseoped position, forming the bottom of the carton with the folded portions of one strip partly enveloped between the folded portions of an adjacent strip, the aggre te width of said strips being substantially equal to the length of the perimeter of the carton.

25.- A carton comprising an outer shell and a shell telesooped within the outer shell. and transverse]: foldable strips each having hinged conneotion at one of its ends to an edge portion of oneshell and at the opposite end to an adjacent edge portion of the other. the hinged ends of said strips extending along the whole length of the edge portions of both ,said shells, said ends and said edge portions, when the shells are in fully telesooped position, lying in the plane of one end of the carton, said strips then being folded with portions of each partly enveloped by an adiacent strip, the strips then forming a bottom for the carton in said plane.

26. A carton comprising an outer shell and a shell telescoped within said outer shell, and transversely foldable strips each having hinged connection at one of its ends with an edge portion of one of the shells and at the opposite end to an 12 adjacent edge portion of the other shell, the

hinged ends of said strips extending along the an adjacent strip.

RICHARD E. PAIGE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 930,114 Adams Aug. 3, 1909 975,121 Carter ..Nov. 8, 1910 1,928,889 Guyer Oc ti3, 1933 2,401,765 Kuhlman June 11, 1946 FOREIGN PATENTS Number Country Date 375,694 Great Britain June 30, 1932 388,971 Great Britain Mar. 9, 1933 

